Once, Asian investors trading US stocks had to stay up late to monitor the market. Now, this dilemma is about to change— but the cost is far more complex than imagined. In mid-December 2025, Nasdaq officially submitted an application to the U.S. Securities and Exchange Commission (SEC), planning to extend US stock trading hours from the current five days a week, 16 hours a day (pre-market/regular/after-hours), to five days a week, 23 hours a day. Once approved, US stocks will trade from 9:00 PM on Sunday to 8:00 PM on Friday, leaving only a 1-hour maintenance window (8:00-9:00 PM) each day. The logic behind this goes far beyond the surface reason of "meeting Asian investors' needs"; it is a highly coordinated institutional effort aimed at pushing traditional finance toward a "never-closing" tokenized future.
From evening trading to 24/7: When will US stock trading rules change?